43497720828 has 18 divisors (see below), whose sum is σ = 109952572184. Its totient is φ = 14499240264.

The previous prime is 43497720817. The next prime is 43497720839. The reversal of 43497720828 is 82802779434.

It is a happy number.

43497720828 is a `hidden beast` number, since 4 + 3 + 497 + 72 + 0 + 82 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (43497720817) and next prime (43497720839).

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 604134976 + ... + 604135047.

Almost surely, 2^43497720828 is an apocalyptic number.

It is an amenable number.

43497720828 is an abundant number, since it is smaller than the sum of its proper divisors (66454851356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

43497720828 is a wasteful number, since it uses less digits than its factorization.

43497720828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1208270033 (or 1208270028 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 54.

The spelling of 43497720828 in words is "forty-three billion, four hundred ninety-seven million, seven hundred twenty thousand, eight hundred twenty-eight".